Space plays and stops
- Left hand
- Bb2Db3F3Bb3
- Family
- Triads
The Doubled Root voicing of Bbm stacks Bb, Db, F and Bb from the bottom up: the root, minor 3rd, 5th and root of the chord.
It's one of the Triads voicings. The others for Bbm are Root Inversion, 1st Inversion and 2nd Inversion.